Pins for Bimini?

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I need two pins for my Bimini top. These pins slide through holes on the gunnel bracket to secure the metal stays. On one end of the pin is a flat locking mechanism that swivels open or close. I know this is a crude description but the best that I can do. I've been to West Marine, hardware stores, and the Internet. No luck. I've jerry rigged using several types of pins with no success. Any suggestions?

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